<!-- <p style="height: 1000px">参数：{{data | json}}</p>
 --><nz-tree #nz_tree
 [nzData]="data"
 nzCheckable
 nzMultiple
 [nzCheckedKeys]="defaultSelectedKeys"
 (nzClick)="nzEvent($event)"
 (nzExpandChange)="nzEvent($event)"
 nzExpandAll="true"
 (nzCheckBoxChange)="nzEvent($event)">
 
</nz-tree>
<div class="drawer-footer">
<button nz-button [nzType]="'default'" (click)="cancel()">
   取消
</button>
<button nz-button [nzType]="'primary'" (click)="ok()">
   提交
</button>
</div>